Pre-charging assembly, power distribution device, battery device and power utilization device

Abstract

The utility model is suitable for the technical field of power distribution, and provides a pre-charging assembly, a power distribution device, a battery device and a power utilization device, the pre-charging assembly comprises a circuit board and a pre-charging resistor, the pre-charging resistor comprises a pre-charging resistor main body and two power connection terminals arranged on the pre-charging resistor main body, and the two power connection terminals are fixed and electrically connected with the circuit board; the pre-charging resistor further comprises an auxiliary terminal arranged on the pre-charging resistor body, the auxiliary terminal and the two power connection terminals are arranged at intervals, and the auxiliary terminal is fixedly connected with the circuit board. In the pre-charging assembly provided by the embodiment of the invention, the pre-charging resistor is fixedly connected to the circuit board through the power connection terminal and the auxiliary terminal, the auxiliary terminal can disperse stress, and the connection reliability between the pre-charging resistor and the circuit board is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a pre-charging assembly, a power distribution device, a battery device and a power consumption device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The battery device is provided with a battery monomer, a power distribution device and other modules. The power distribution device is usually provided with a pre-charging assembly for protecting the main positive relay. The pre-charging assembly includes a circuit board and a pre-charging resistor. However, in some cases, the pre-charging resistor and the circuit board have a risk of connection failure, which causes the pre-charging assembly to fail to work normally. UTILITY MODEL CONTENT

[0004] Therefore, the present application provides a pre-charging assembly, a power distribution device, a battery device and a power consumption device, aiming to improve the connection reliability of the pre-charging resistor and the circuit board.

[0005] The first aspect of the present application provides a pre-charging assembly, comprising: a circuit board; a pre-charging resistor, comprising a pre-charging resistor body and two electrical connection terminals arranged on the pre-charging resistor body, the two electrical connection terminals being fixed and electrically connected to the circuit board; the pre-charging resistor further comprises an auxiliary terminal arranged on the pre-charging resistor body, the auxiliary terminal being arranged apart from the two electrical connection terminals, and the auxiliary terminal being fixedly connected to the circuit board.

[0006] The pre-charging assembly provided by the present application comprises a circuit board and a pre-charging resistor. The pre-charging resistor comprises a pre-charging resistor body, two electrical connection terminals and an auxiliary terminal arranged on the pre-charging resistor body. The pre-charging resistor is electrically connected to the circuit board through the two electrical connection terminals, without the need for using a wire harness connection, thereby saving the space occupied by the pre-charging assembly. The pre-charging resistor is fixedly connected to the circuit board through the two electrical connection terminals and the auxiliary terminal. The auxiliary terminal can disperse stress, thereby reducing the risk of connection failure of the two electrical connection terminals and the circuit board, and improving the connection reliability of the pre-charging resistor and the circuit board.

[0007] In some embodiments, the circuit board is provided with two first connection holes and a second connection hole. The two electrical connection terminals are inserted into the two first connection holes one by one, and the auxiliary terminal is inserted into the second connection hole.

[0008] By adopting the technical scheme, the first connecting hole and the second connecting hole are arranged on the circuit board, the power connection terminal is inserted into the first connecting hole, and the auxiliary terminal is inserted into the second connecting hole, the hole wall of the first connecting hole and the second connecting hole can provide a limiting effect, the connection strength between the power connection terminal and the circuit board and the connection strength between the auxiliary terminal and the circuit board are high, the anti-vibration and anti-impact capability is strong, and the electrical connection reliability of the power connection terminal and the circuit board is high.

[0009] In some embodiments, the two power connection terminals and the auxiliary terminal are respectively welded to the circuit board.

[0010] By adopting the technical scheme, the power connection terminal and the auxiliary terminal are fixed to the circuit board by welding, the connection reliability is good, the risk of loosening is small, and the use reliability of the pre-charging assembly is improved.

[0011] In some embodiments, the pre-charging resistor body includes a shell and a resistor assembly arranged in the shell, the shell is a ceramic shell; the number of auxiliary terminals is two, the two auxiliary terminals are respectively arranged adjacent to the two power connection terminals one by one, and the auxiliary terminals are electrically connected to the resistor assembly and the circuit board.

[0012] By adopting the technical scheme, the two auxiliary terminals and the two power connection terminals are arranged adjacent to each other one by one, and the auxiliary terminals also serve as electrical pins for electrical connection, so that the two auxiliary terminals not only improve the connection reliability between the pre-charging resistor and the circuit board, but also improve the structural stability of the pre-charging assembly and the electrical performance of the pre-charging resistor.

[0013] In some embodiments, the two power connection terminals are respectively arranged at opposite ends of the pre-charging resistor body along a first direction, and the auxiliary terminal and the power connection terminal are arranged opposite to each other and parallel to each other along the first direction.

[0014] By adopting the technical scheme, the auxiliary terminal and the power connection terminal can be conveniently connected to the same electrical component, the design of the circuit board is simplified, and the layout space of the circuit board is saved; at the same time, the auxiliary terminal and the power connection terminal are arranged in parallel, the auxiliary terminal can effectively resist bending or vibration stress from multiple directions, and the mechanical reliability is improved.

[0015] In some embodiments, at one end of the pre-charging resistor along the first direction, the distance between the auxiliary terminal and the power connection terminal is greater than or equal to 5mm.

[0016] By adopting the technical scheme, the auxiliary terminal and the power connection terminal can be conveniently welded respectively, and short circuit is not easy to occur.

[0017] In some embodiments, the pre-charging resistor body comprises a shell and a resistor assembly arranged in the shell, the shell is a metal shell, and the auxiliary terminal is connected to the shell.

[0018] By adopting the above technical solution, the auxiliary terminal is arranged on the metal shell, without the need to increase a connecting terminal on the resistor assembly, the manufacturing difficulty of the auxiliary terminal is reduced, the auxiliary terminal can disperse stress, and the mechanical reliability of the pre-charging assembly can also be improved.

[0019] In some embodiments, the two power connection terminals are arranged at intervals along a first direction; the number of auxiliary terminals is two, and the two auxiliary terminals are arranged at intervals along a second direction intersecting the first direction, or the number of auxiliary terminals is one, and the auxiliary terminal is arranged on one side of the pre-charging resistor along the second direction.

[0020] By adopting the above technical solution, the four terminals form a stable support surface, which can resist multi-dimensional mechanical stress, and the connection reliability between the pre-charging resistor and the circuit board is improved; or the one auxiliary terminal and the two power connection terminals form a triangular structure, which can also improve the connection reliability between the pre-charging resistor and the circuit board.

[0021] In some embodiments, the auxiliary terminal comprises a first connecting part and a second connecting part, the second connecting part is arranged at one end of the first connecting part facing the circuit board, the width of the first connecting part is greater than the width of the second connecting part, the second connecting part is inserted into the second connecting hole, and the first connecting part abuts against the circuit board.

[0022] By adopting the above technical solution, the first connecting part of the auxiliary terminal abuts against the circuit board, and the second connecting part is inserted into the second connecting hole, thereby improving the anti-vibration effect.

[0023] In some embodiments, the auxiliary terminal and the shell are in an integrated structure.

[0024] By adopting the above technical solution, the auxiliary terminal is manufactured on the shell in an integrated manner, the manufacturing process of the auxiliary terminal is simplified, the manufacturing cost of the pre-charging resistor is reduced, and the connection strength between the auxiliary terminal and the shell is improved.

[0025] Embodiments of the second aspect of the present application propose a power distribution device comprising the pre-charging assembly provided in the first aspect.

[0026] Embodiments of the third aspect of the present application propose a battery device comprising the power distribution device provided in the second aspect and a battery cell assembly, the battery cell assembly being electrically connected to the power distribution device.

[0027] Embodiments of the fourth aspect of the present application propose a power consumption device comprising the battery device provided in the third aspect, the battery device being used for storing or providing electric energy.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0031] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0032] Figure 3 Schematic diagram of a battery device provided for other embodiments of this application;

[0033] Figure 4 This is a perspective view of a power distribution device provided in some embodiments of this application;

[0034] Figure 5 A perspective view of a pre-charge component provided in some embodiments of this application;

[0035] Figure 6 for Figure 5 A three-dimensional schematic diagram of the pre-charge resistor in the pre-charge component shown.

[0036] Figure 7 for Figure 5 Side view of the precharged component shown;

[0037] Figure 8 Perspective view of a pre-charge component provided for other embodiments of this application;

[0038] Figure 9 for Figure 8 A three-dimensional schematic diagram of the pre-charge resistor in the pre-charge component shown.

[0039] Figure 10 for Figure 9 The exploded 3D view of the pre-charge resistor is shown.

[0040] The markings in the diagram mean:

[0041] 1000, vehicle; 1001, battery device; 1002, controller; 1003, motor; 200, battery cell assembly; 210, battery cell; 300, box; 310, first box; 320, second box; 100, power distribution device; 10, pre-charge assembly; 11, circuit board; 111, first connecting hole; 112, second connecting hole; 12, pre-charge resistor; 121, pre-charge resistor body; 1211, shell; 1212, resistor assembly; 122, power terminal; 123, auxiliary terminal; 1231, first connecting part; 1232, second connecting part; 13, pre-charge relay. DETAILED DESCRIPTION

[0042] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0045] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0047] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0048] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise specifically specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0051] If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0052] In some cases, the power distribution device is a device for controlling the charging and discharging of the battery unit, and the power distribution device comprises a main positive module, a main negative module and a pre-charging assembly. The main positive module comprises a main positive relay. The pre-charging assembly comprises a pre-charging resistor and a pre-charging relay. The main negative module comprises a main negative relay. The main positive relay is electrically connected between the positive electrode of the battery unit and the positive electrode of the load. The pre-charging relay is connected in parallel with the main positive relay. The pre-charging resistor is connected in series with the pre-charging relay. The main negative relay is electrically connected between the negative electrode of the battery unit and the negative electrode of the load. The load generally comprises a capacitor, i.e., the load is a capacitive load. The load can be a motor controller, a motor, an air conditioner compressor, a heater, etc. However, when the battery unit supplies power to the capacitive load, if the main positive relay is directly connected to the capacitive load, the voltage of the battery unit is relatively high, and the voltage of the capacitor is close to 0V. At this time, it is equivalent to an instantaneous short circuit, and the instantaneous current in the circuit is relatively large, so the main positive relay is easily damaged. The pre-charging resistor and the pre-charging relay are provided in the main positive module, and the pre-charging resistor and the pre-charging relay form a pre-charging circuit. In use, the main positive relay can be disconnected, and the pre-charging relay can be connected. The pre-charging resistor and the pre-charging relay are connected in series between the battery unit and the resistive capacitive load. Because the pre-charging resistor has a certain resistance value, the current in the circuit can be reduced, and the pre-charging resistor plays a role in current limiting, thereby reducing the risk of damage to the main positive relay. After the voltage of the capacitor in the capacitive load reaches a preset value, the pre-charging relay is disconnected, and the main positive relay is connected, thereby achieving discharging of the battery unit.

[0053] The pre-charging assembly comprises a circuit board and a pre-charging resistor, but the pre-charging resistor and the circuit board have a risk of connection failure, which causes the pre-charging assembly to fail to work normally. In some cases, the pre-charging resistor uses a high-power resistor, and the self-volume and weight of the pre-charging resistor increase. If the connection strength of the pre-charging resistor and the circuit board is insufficient to support the weight of the pre-charging resistor, the connection structure of the pre-charging resistor and the circuit board is easily damaged in the vibration process, which causes the circuit to be disconnected and fail to work normally.

[0054] Therefore, the pre-charging assembly provided in the embodiments of the present application comprises a circuit board and a pre-charging resistor. The pre-charging resistor comprises a pre-charging resistor body and two electrical connection terminals provided on the pre-charging resistor body. The two electrical connection terminals are fixedly and electrically connected to the circuit board. An auxiliary terminal is further provided on the pre-charging resistor body and fixedly connected to the circuit board. In this way, the pre-charging resistor can be fixedly connected to the circuit board through the two electrical connection terminals and the auxiliary terminal. The auxiliary terminal can disperse the stress, so that the structure of the pre-charging assembly is more stable, the risk of connection failure of the pre-charging resistor and the circuit board is reduced, and the connection reliability of the pre-charging resistor and the circuit board is enhanced.

[0055] The power distribution device disclosed in the embodiments of the present application can be used in a battery device to serve as a control unit for distributing battery energy and to perform high-voltage distribution on the battery.

[0056] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0057] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0058] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device is, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0059] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0060] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided in some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 1001, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 1001 can be used for power supply of the vehicle 1000, for example, the battery device 1001 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 1002 and a motor 1003, and the controller 1002 is used to control the battery device 1001 to supply power to the motor 1003, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0061] In some embodiments of the present application, the battery device 1001 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0062] Reference is made to Figure 2 , Figure 2An exploded structural schematic view of a battery apparatus 1001 is provided for some embodiments of the present application. The battery apparatus referred to in embodiments of the present application can include one or more battery cell assemblies 200 for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 210 connected in series, in parallel, or in a mixed connection through busbar components.

[0063] In some embodiments, the battery cell assembly 200 is generally formed by an arrangement of a plurality of battery cells 210.

[0064] As an example, the battery cell assembly 200 can be a battery module formed by an arrangement and fixation of a plurality of battery cells 210 into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells 210 with a cable tie.

[0065] In some embodiments, the battery apparatus 1001 can be a battery pack including a housing 300 and one or more battery cell assemblies 200 housed in the housing 300.

[0066] As an example, the battery cell assembly 200 can be a battery module, and the battery cell assembly 200 can be housed in the housing 300 by fixing the battery module in the housing 300.

[0067] As an example, the battery cell assembly 200 can also be housed in the housing 300 by directly fixing a plurality of battery cells 210 in the housing 300.

[0068] As an example, the housing 300 can include a first housing 310 and a second housing 320. The first housing 310 and the second housing 320 are fastened so that an enclosed space is formed inside the housing 300 to house the battery cell assembly 200. The enclosed here means covered or closed, which can be sealed or unsealed. The first housing 310 can be a top cover or a bottom plate.

[0069] As an example, the housing 300 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the housing 300 to house the battery cell assembly.

[0070] In some embodiments, the housing 300 can be part of a chassis structure of a vehicle. For example, part of the housing 300 can be at least part of a floor of the vehicle, or part of the housing 300 can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0071] The technical solutions described in the embodiments of the present application are applicable to various battery cell using electric devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles and spaceships.

[0072] Please refer to Figures 1 to 3 , the battery device 1001 further comprises a power distribution device 100. The power distribution device 100 can be arranged in the box 300, or can be arranged outside the box 300. The power distribution device 100 is electrically connected with the battery cell assembly 200.

[0073] The power distribution device 100 comprises a pre-charging assembly, and the embodiment of the first aspect of the present application provides a pre-charging assembly.

[0074] Please refer to Figures 4 to 7 , the pre-charging assembly 10 comprises a circuit board 11 and a pre-charging resistor 12, the pre-charging resistor 12 comprises a pre-charging resistor body 121 and two electrical connection terminals 122 arranged on the pre-charging resistor body 121, the two electrical connection terminals 122 are fixed and electrically connected with the circuit board 11; the pre-charging resistor 12 further comprises an auxiliary terminal 123 arranged on the pre-charging resistor body 121, the auxiliary terminal 123 is arranged spaced apart from the two electrical connection terminals 122, and the auxiliary terminal 123 is fixedly connected with the circuit board 11.

[0075] The circuit board 11 (Printed Circuit Board, abbreviated as PCB) is a printed circuit board used for fixing and connecting electronic components (such as resistors, capacitors, chips, relays, etc.). The circuit board 11 includes but is not limited to a flexible circuit board (Flexible Printed Circuit Board, abbreviated as FPC), a rigid circuit board.

[0076] The pre-charging resistor 12 can refer to a resistor in a circuit that plays a role in limiting current, which can reduce the instantaneous large current impact on the circuit.

[0077] The pre-charging resistor body 121 can refer to the main part of the pre-charging resistor 12, and the electrical connection terminal 122 can refer to the electrical pin of the pre-charging resistor 12 for electrical connection. The electrical connection terminal 122 simultaneously plays a role in electrical connection and mechanical connection.

[0078] The two electrical connection terminals 122 are arranged spaced apart, and each electrical connection terminal 122 is fixedly connected with the circuit board 11. For example, the electrical connection terminal 122 can be fixedly connected with the circuit board 11 by at least one of plug-in, clamping, welding, screwing, bonding, riveting and the like. Of course, the electrical connection terminal 122 can also be connected by other ways capable of realizing the fixed connection between the electrical connection terminal 122 and the circuit board 11.

[0079] The power connection terminals 122 are also electrically connected with the circuit board 11. It can be understood that the circuit board 11 is provided with a conductive circuit, one end of the power connection terminal 122 is electrically connected with the pre-charging resistor body 121, and the other end is electrically connected with the conductive circuit in the circuit board 11. By electrically connecting the two power connection terminals 122 with the circuit board 11, the electrical connection between the pre-charging resistor 12 and the circuit board 11 is realized, and the wire harness is not needed to connect the pre-charging resistor 12 and the circuit board 11, thereby saving the space occupied by the pre-charging assembly 10.

[0080] The auxiliary terminal 123 is fixedly connected with the circuit board 11. For example, the auxiliary terminal 123 can be fixedly connected with the circuit board 11 by at least one of plug-in connection, clamping connection, welding connection, screwing connection, bonding connection, riveting connection and the like. Of course, the auxiliary terminal 123 can also be connected by other ways capable of realizing the fixed connection between the auxiliary terminal 123 and the circuit board 11.

[0081] The auxiliary terminal 123 can be an electrical pin for electrical connection led out by the pre-charging resistor 12, and the structure of the auxiliary terminal 123 can be the same as or different from that of the power connection terminal 122. The auxiliary terminal 123 can also be a mechanical connection structure on the pre-charging resistor 12, which only plays a mechanical connection role and does not need to be electrically connected with the circuit board 11.

[0082] The number of the auxiliary terminal 123 can be one, two or more than two. The auxiliary terminal 123 is arranged at intervals from the two power connection terminals 122, does not hinder the connection operation of the power connection terminals 122 and the circuit board 11, and is also more conducive to dispersing stress by using the auxiliary terminal 123.

[0083] By arranging the auxiliary terminal 123, when the pre-charging assembly is subjected to vibration or impact, the auxiliary terminal 123 can disperse stress, thereby reducing the stress at the two power connection terminals 122 and reducing the risk of connection failure of the two power connection terminals 122 and the circuit board 11.

[0084] The pre-charging assembly provided by the embodiment of the application includes the circuit board 11 and the pre-charging resistor 12. The pre-charging resistor 12 includes the pre-charging resistor body 121 and the two power connection terminals 122 and the auxiliary terminal 123 arranged on the pre-charging resistor body 121. The pre-charging resistor 12 is electrically connected with the circuit board 11 by the two power connection terminals 122, without using a wire harness, thereby saving the space occupied by the pre-charging assembly. The pre-charging resistor 12 is fixedly connected with the circuit board 11 by the two power connection terminals 122 and the auxiliary terminal 123. The auxiliary terminal 123 can disperse stress, thereby reducing the risk of connection failure of the two power connection terminals 122 and the circuit board 11 and improving the connection reliability of the pre-charging resistor 12 and the circuit board 11.

[0085] Since the connection reliability between the pre-charging resistor 12 and the circuit board 11 is good, the pre-charging resistor 12 can be a large-power resistor with large weight and volume, thereby being conducive to improving the performance of the pre-charging assembly 10.

[0086] In some embodiments, the circuit board 11 is provided with two first connecting holes 111 and a second connecting hole 112, two electrical connection terminals 122 are respectively inserted into the two first connecting holes 111, and the auxiliary terminal 123 is inserted into the second connecting hole 112.

[0087] The first connecting hole 111 and the second connecting hole 112 can be through holes on the circuit board 11, the two electrical connection terminals 122 are arranged in one-to-one correspondence with the two first connecting holes 111, and the electrical connection terminal 122 is inserted into the corresponding first connecting hole 111 to realize the conductive connection between the electrical connection terminal 122 and the circuit board 11. The shape and size of the first connecting hole 111 can be adapted to the electrical connection terminal 122 to facilitate the connection between the two. The length of the electrical connection terminal 122 can be greater than the thickness of the circuit board 11, so that the electrical connection terminal 122 can extend to the side of the circuit board 11 away from the pre-charging resistor 12.

[0088] The auxiliary terminal 123 is inserted into the corresponding second connecting hole 112 to realize the fixed connection between the auxiliary terminal 123 and the circuit board 11. The shape and size of the second connecting hole 112 can be adapted to the auxiliary terminal 123 to facilitate the connection between the two. The length of the auxiliary terminal 123 can be greater than the thickness of the circuit board 11, so that the auxiliary terminal 123 can extend to the side of the circuit board 11 away from the pre-charging resistor 12.

[0089] By providing the first connecting hole 111 and the second connecting hole 112 on the circuit board 11, and inserting the electrical connection terminal 122 into the first connecting hole 111 and the auxiliary terminal 123 into the second connecting hole 112, the hole wall of the first connecting hole 111 and the second connecting hole 112 can provide a limiting effect, so that the connection strength between the electrical connection terminal 122 and the circuit board 11 and the auxiliary terminal 123 and the circuit board 11 is high, the anti-vibration and impact ability is strong, and the electrical connection reliability between the electrical connection terminal 122 and the circuit board 11 is high.

[0090] In some embodiments, the two electrical connection terminals 122 and the auxiliary terminal 123 are respectively welded to the circuit board 11.

[0091] The electrical connection terminal 122 is welded to the circuit board 11. It can be understood that the electrical connection terminal 122 is fixed on the circuit board 11 by welding, and the electrical connection terminal 122 is electrically connected with the conductive circuit in the circuit board 11.

[0092] The auxiliary terminal 123 is welded to the circuit board 11. If the auxiliary terminal 123 is a conductive pin, the auxiliary terminal 123 is electrically connected with the conductive circuit in the circuit board 11; if the auxiliary terminal 123 is a mechanical connection structure, the auxiliary terminal 123 can be welded to the area outside the conductive circuit of the circuit board 11.

[0093] Optionally, the power terminal 122 can be welded to the hole wall of the first connecting hole 111, and can also be welded to a solder pad on the circuit board 11. The solder pad is a metal area exposed on the circuit board 11 and designed for welding electronic components. The power terminal 122 is welded to the solder pad, so that the power terminal 122 can be fixedly connected to the circuit board 11 through the solder pad. The auxiliary terminal 123 can be welded to the hole wall of the second connecting hole 112, and can also be welded to a solder pad on the circuit board 11. The auxiliary terminal 123 is welded to the solder pad, so that the auxiliary terminal 123 can be fixedly connected to the circuit board 11 through the solder pad.

[0094] By adopting the technical scheme of the embodiment, the power terminal 122 and the auxiliary terminal 123 are fixedly connected to the circuit board 11 through welding, which has good connection reliability and small risk of loosening, and is conducive to improving the use reliability of the pre-charging assembly. In addition, the welding mode is easy to realize automatic welding, which is conducive to improving the assembly efficiency.

[0095] Please refer to Figures 4 to 7 In some embodiments, the pre-charging resistor body 121 includes a shell 1211 and a resistor assembly 1212 arranged in the shell 1211. The shell 1211 is a ceramic shell. The number of auxiliary terminals 123 is two. The two auxiliary terminals 123 are arranged adjacent to the two power terminals 122 one by one. The auxiliary terminal 123 is electrically connected to the resistor assembly 1212 and the circuit board 11.

[0096] The shell 1211 is the external shell of the pre-charging resistor body 121. The resistor assembly 1212 is a component in the pre-charging resistor 12, which is used to realize the function of the pre-charging resistor 12. The shell 1211 and the resistor assembly 1212 can be assembled to form a pre-charging body or be an integral structure.

[0097] In the embodiment, the shell 1211 is a ceramic shell. Optionally, the resistor assembly 1212 can include a ceramic base and a resistor body arranged on the ceramic base. In other embodiments, the shell 1211 can also be made of other materials.

[0098] In the embodiment, the auxiliary terminal 123 and the power terminal 122 are both led out from the resistor assembly 1212 and protrude from one side of the resistor assembly 1212. The two auxiliary terminals 123 are arranged adjacent to the two power terminals 122 one by one. For example, the two first power terminals 122 are arranged at intervals along the first direction X. The two auxiliary terminals 123 are arranged adjacent to and at intervals from the two first power terminals 122. Optionally, the two auxiliary terminals 123 are arranged outside the two power terminals 122, or the two auxiliary terminals 123 can also be arranged between the two power terminals 122.

[0099] One end of the auxiliary terminal 123 is electrically connected to the resistor assembly 1212, and the other end is electrically connected to the circuit board 11, that is, the auxiliary terminal 123 is also an electrically connected electrical pin.

[0100] By adopting the above technical scheme, the two auxiliary terminals 123 are arranged adjacent to the two power connection terminals 122 one by one, and the auxiliary terminal 123 also serves as an electrically connected electrical pin. In this way, the two auxiliary terminals 123 not only improve the connection reliability between the pre-charging resistor 12 and the circuit board 11, improve the structural stability of the pre-charging assembly, but also improve the electrical performance of the pre-charging resistor 12.

[0101] In some embodiments, the two power connection terminals 122 are respectively arranged at opposite ends of the pre-charging resistor body 121 along the first direction X, and the auxiliary terminal 123 is arranged opposite to the power connection terminal 122 along the first direction X and parallel to each other.

[0102] It can be understood that the second connecting hole 112 is adapted to the auxiliary terminal 123, that is, the two second connecting holes 112 and the two first connecting holes 111 are all arranged at intervals along the first direction X.

[0103] Optionally, the auxiliary terminal 123 and the power connection terminal 122 can be the same structure.

[0104] Optionally, the auxiliary terminal 123 and the power connection terminal 122 arranged side by side are connected to the same electrical component (such as a resistance wire) in the resistor assembly 1212 and to the same internal circuit in the circuit board 11.

[0105] Optionally, the auxiliary terminal 123 and the power connection terminal 122 arranged side by side can be connected in parallel to improve the current carrying capacity and improve the heat dissipation performance.

[0106] By arranging the auxiliary terminal 123 and the power connection terminal 122 parallel and adjacent to each other, the auxiliary terminal 123 and the power connection terminal 122 can be conveniently connected to the same electrical component, simplifying the design of the circuit board 11 and saving the layout space of the circuit on the circuit board 11. At the same time, by arranging the auxiliary terminal 123 and the power connection terminal 122 parallel to each other, the auxiliary terminal 123 can effectively resist bending or vibration stress from multiple directions, which is beneficial to improve the mechanical reliability.

[0107] In some embodiments, at one end of the pre-charging resistor 12 along the first direction X, the distance D between the auxiliary terminal 123 and the power connection terminal 122 is greater than or equal to 5 mm.

[0108] The distance D between the auxiliary terminal 123 and the power connection terminal 122 can be 5 mm or more; since the auxiliary terminal 123 and the power connection terminal 122 are arranged at intervals along the first direction X, the distance D between the auxiliary terminal 123 and the power connection terminal 122 should be less than half of the size of the pre-charging resistor 12 along the first direction X.

[0109] The auxiliary terminal 123 and the power terminal 122 can have the same interval at both ends of the pre-charge resistor 12 along the first direction X to improve mechanical reliability.

[0110] The interval D between the auxiliary terminal 123 and the power terminal 122 is greater than or equal to 5 mm, so that the welding operation can be conveniently performed on the auxiliary terminal 123 and the power terminal 122 respectively, and short circuit is less likely to occur.

[0111] Please refer to Figures 8 to 10 In some embodiments, the pre-charge resistor body 121 includes a shell 1211 and a resistor assembly 1212 arranged in the shell 1211. The shell 1211 is a metal shell, and the auxiliary terminal 123 is connected to the shell 1211.

[0112] The shell 1211 is a metal shell, for example, the shell 1211 can be made of aluminum alloy, stainless steel, copper or copper alloy, etc. One end of the metal shell is open, the resistor assembly 1212 is arranged in the interior of the shell 1211, and the circuit board 11 is arranged on the side of the metal shell having the opening. In this embodiment, one end of the auxiliary terminal 123 is connected to the shell 1211, and the other end is connected to the circuit board 11. The auxiliary terminal 123 can be arranged on the shell 1211 by integral molding, or can be fixedly connected to the shell 1211 by locking, welding or the like.

[0113] The metal shell and the resistor assembly 1212 are arranged in an insulating manner, and the auxiliary terminal 123 is arranged on the shell 1211. The auxiliary terminal 123 plays a mechanical connection role and is not used as an electrical pin.

[0114] In the embodiments of the present application, by arranging the auxiliary terminal 123 on the metal shell, it is not necessary to add a connecting terminal on the resistor assembly 1212, which reduces the manufacturing difficulty of the auxiliary terminal 123. The auxiliary terminal 123 can disperse stress and also play a role in improving the mechanical reliability of the pre-charge assembly.

[0115] In some embodiments, the two power terminals 122 are arranged at intervals along the first direction X; the number of auxiliary terminals 123 is two, and the two auxiliary terminals 123 are arranged at intervals along the second direction Y intersecting the first direction X, or the number of auxiliary terminals 123 is one, and the auxiliary terminal 123 is arranged on one side of the pre-charge resistor 12 along the second direction.

[0116] For example, the first direction X is the length direction of the pre-charge resistor 12, and the second direction Y is the width direction of the pre-charge resistor 12.

[0117] For example, the first direction X is the length direction of the pre-charge resistor 12, and the second direction Y is the width direction of the pre-charge resistor 12. Figures 8 to 10As shown, in some embodiments, two auxiliary terminals 123 are arranged along the second direction Y. It can be understood that the second connecting holes 112 are matched with the auxiliary terminals 123, that is, two second connecting holes 112 are arranged on the circuit board 11 along the second direction Y.

[0118] For example, the two auxiliary terminals 123 are arranged at the middle of the pre-charge resistor 12 along the second direction Y.

[0119] In other embodiments, the auxiliary terminal 123 can also be one, and the auxiliary terminal 123 and the two power terminals 122 form a triangular structure, which can also improve the connection reliability of the pre-charge resistor 12 and the circuit board 11. Optionally, along the first direction X, the auxiliary terminal 123 is located at the middle of the pre-charge resistor 12.

[0120] By adopting the above technical solutions, the two power terminals 122 are arranged along the first direction X, and the two auxiliary terminals 123 are arranged along the second direction Y, and the four terminals form a stable support surface, which can resist multidimensional mechanical stress and improve the connection reliability between the pre-charge resistor 12 and the circuit board 11. Alternatively, one auxiliary terminal 123 and two power terminals 122 form a triangular structure, which can also improve the connection reliability of the pre-charge resistor 12 and the circuit board 11.

[0121] In some embodiments, the auxiliary terminal 123 includes a first connecting portion 1231 and a second connecting portion 1232, the second connecting portion 1232 is arranged at one end of the first connecting portion 1231 towards the circuit board 11, the width of the first connecting portion 1231 is greater than the width of the second connecting portion 1232, the second connecting portion 1232 is inserted into the second connecting hole 112, and the first connecting portion 1231 abuts against the circuit board 11.

[0122] The auxiliary terminal 123 is in a sheet shape, and the width of the first connecting portion 1231 and the width of the second connecting portion 1232 are both the extension dimensions of themselves along the first direction X. Since the width of the first connecting portion 1231 is greater than the width of the second connecting portion 1232, the part of the first connecting portion 1231 protruding outside the second connecting portion 1232 forms a stepped abutting surface. When the pre-charge resistor 12 is connected to the circuit board 11, the second connecting portion 1232 is inserted into the second connecting hole 112, and the abutting surface of the first connecting portion 1231 abuts against the circuit board 11, the first connecting portion 1231 is in plane contact with the circuit board 11, which further improves the anti-vibration effect.

[0123] By adopting the above technical solutions, the first connecting portion 1231 of the auxiliary terminal 123 abuts against the circuit board 11, and the second connecting portion 1232 is inserted into the second connecting hole 112, which improves the anti-vibration effect and further reduces the risk of disconnection and connection failure of the pre-charge resistor 12 and the circuit board 11.

[0124] In some embodiments, the auxiliary terminal 123 is integrally formed with the shell 1211.

[0125] The auxiliary terminal 123 is also made of metal, and the auxiliary terminal 123 is integrally formed on the shell 1211, which simplifies the manufacturing process of the auxiliary terminal 123, reduces the manufacturing cost of the pre-charge resistor 12, and improves the connection strength between the auxiliary terminal 123 and the shell 1211.

[0126] Please refer to Figures 4 to 10 Some embodiments of the present application provide a pre-charge assembly, which includes a circuit board 11 and a pre-charge resistor 12, and the pre-charge resistor 12 includes a pre-charge resistor body 121 and two electrical connection terminals 122 arranged on the pre-charge resistor body 121, and the two electrical connection terminals 122 are fixed and electrically connected to the circuit board 11; the pre-charge resistor 12 further includes an auxiliary terminal 123 arranged on the pre-charge resistor body 121, and the auxiliary terminal 123 is arranged spaced apart from the two electrical connection terminals 122, and the auxiliary terminal 123 is fixedly connected to the circuit board 11. The circuit board 11 is provided with two first connection holes 111 and a second connection hole 112, and the two electrical connection terminals 122 are correspondingly inserted into the two first connection holes 111, and the auxiliary terminal 123 is inserted into the second connection hole 112.

[0127] The pre-charge resistor body 121 includes a shell 1211 and a resistor assembly 1212 arranged in the shell 1211, and optionally, the two auxiliary terminals 123 are arranged adjacent to the two electrical connection terminals 122 one by one, and the auxiliary terminal 123 is electrically connected to the resistor assembly 1212 and the circuit board 11; optionally, the shell 1211 is a metal shell, and the auxiliary terminal 123 is connected to the shell 1211.

[0128] In some embodiments, the pre-charge assembly further includes a pre-charge relay 13, which is mounted on the circuit board 11 and electrically connected to the circuit board 11.

[0129] The pre-charge assembly provided by the embodiments of the present application disperses the stress on the electrical connection terminals 122 by arranging the auxiliary terminal 123, and improves the connection reliability between the pre-charge resistor 12 and the circuit board 11.

[0130] The embodiments of the second aspect of the present application provide a power distribution device, which includes the pre-charge assembly provided by the first aspect.

[0131] The embodiments of the third aspect of the present application provide a battery device 1001, which includes the power distribution device 100 provided by the first aspect and a battery cell assembly 200, and the battery cell assembly 200 is electrically connected to the power distribution device 100.

[0132] The embodiments of the fourth aspect of the present application provide a power consumption device, which includes the battery device 1001 provided by the second aspect, and the battery device 1001 is used for storing or providing electric energy.

[0133] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A pre-charging assembly characterized by, The pre-charge resistor comprises a resistor body and two connection terminals arranged on the resistor body, the two connection terminals are fixed and electrically connected with the circuit board; the pre-charge resistor further comprises an auxiliary terminal arranged on the resistor body, the auxiliary terminal is spaced apart from the two connection terminals, and the auxiliary terminal is fixedly connected with the circuit board. The circuit board is provided with two first connection holes and a second connection hole, the two connection terminals are inserted into the two first connection holes one by one, and the auxiliary terminal is inserted into the second connection hole. The two connection terminals and the auxiliary terminal are respectively welded on the circuit board.

2. The pre-filled assembly of claim 1, wherein, The resistor body comprises a shell and a resistor assembly arranged in the shell, and the shell is a ceramic shell.

3. The pre-filled assembly of claim 2, wherein, The number of auxiliary terminals is two, the two auxiliary terminals are arranged adjacent to the two connection terminals one by one, and the auxiliary terminals are electrically connected with the resistor assembly and the circuit board.

4. The pre-filled assembly of claim 2, wherein, The two connection terminals are respectively arranged at opposite ends of the pre-charge resistor body along a first direction, and the auxiliary terminal is arranged opposite to the connection terminals along the first direction and parallel to each other. At one end of the pre-charge resistor along the first direction, the distance between the auxiliary terminal and the connection terminal is greater than or equal to 5 mm.

5. The pre-filled assembly of claim 4, wherein, The resistor body comprises a shell and a resistor assembly arranged in the shell, and the shell is a metal shell, and the auxiliary terminal is connected to the shell.

6. The pre-filled assembly of claim 5, wherein, 8. The pre-charge assembly of claim 7, wherein:

7. The pre-filled assembly of claim 2, wherein, The two connection terminals are spaced apart along a first direction; wherein the number of auxiliary terminals is two, the two auxiliary terminals are spaced apart along a second direction, and the second direction intersects the first direction, or The number of auxiliary terminals is one, and the auxiliary terminal is arranged on one side of the pre-charge resistor along the second direction. The auxiliary terminal comprises a first connecting portion and a second connecting portion, the second connecting portion is arranged at one end of the first connecting portion facing the circuit board, the width of the first connecting portion is greater than the width of the second connecting portion, the second connecting portion is inserted into the second connection hole, and the first connecting portion abuts against the circuit board. The auxiliary terminal and the shell are an integral structure.

9. The pre-filled assembly of claim 7, wherein, The pre-charge assembly of any one of claims 1-10.

10. The pre-filled assembly of claim 7, wherein, The power distribution device and the battery cell assembly of claim 11, the battery cell assembly is electrically connected with the power distribution device.

11. A power distribution device, characterized by The battery device of claim 12, the battery device is used for storing or providing electric energy.

12. A battery device characterized by comprising: ​ 13. An electrical device, comprising: ​

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